HtmlEmailExceptionMiddleware

HtmlEmailExceptionMiddleware

import sys
from django.conf import settings
from django.views import debug
from django.core.mail import EmailMultiAlternatives
from django.core import urlresolvers
from django import http

class HtmlEmailExceptionMiddleware(object):
    '''
    Middleware to email an html stacktrace and local variables like
    the html error page normally displayed by django when DEBUG is True.

    References:
        http://docs.djangoproject.com/en/dev/topics/http/middleware/#process-exception
        django.core.handlers.BaseHandler.handle_uncaught_exception
    '''
    def process_exception(self, request, exception):

        # Allow 404s to bubble up normally
        if isinstance(exception, http.Http404):
            return None

        exc_info = sys.exc_info()
        response = debug.technical_500_response(request, *exc_info)
        if settings.DEBUG:
            return response

        # Email the django html error page
        subject = 'Error (%s IP): %s' % ((request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS and 'internal' or 'EXTERNAL'), request.path)
        try:
            request_repr = repr(request)
        except:
            request_repr = "Request repr() unavailable"
        message = "%s\n\n%s" % (self.get_traceback(exc_info), request_repr)
        self.mail_admins(subject, message, html_message=response.content)

        # Return the friendly 500 page
        urlconf = getattr(request, "urlconf", settings.ROOT_URLCONF)
        resolver = urlresolvers.RegexURLResolver(r'^/', urlconf)
        callback, param_dict = resolver.resolve500()
        return callback(request, **param_dict)

    def mail_admins(self, subject, message, html_message=None):
        if not settings.ADMINS:
            return
        email = EmailMultiAlternatives(settings.EMAIL_SUBJECT_PREFIX + subject, 
                    message, settings.SERVER_EMAIL, [a[1] for a in settings.ADMINS])
        if html_message:
            email.attach_alternative(html_message, "text/html")
        email.send(fail_silently=True)
     
    def get_traceback(self, exc_info=None):
        "Helper function to return the traceback as a string"
        import traceback
        return '\n'.join(traceback.format_exception(*(exc_info or sys.exc_info())))